CN207689610U - A kind of circuit protection device using light bulb current limliting - Google Patents

Abstract

The utility model discloses a circuit protection device using a light bulb to limit the current, which comprises a power connector, a socket panel, an ammeter, a bulb, a lamp holder, a short circuit switch, a main switch, and a fuse; the socket panel, the ammeter, the main switch, a fuse, and a power connector , bulbs, and lamp holders are connected in series, and the short-circuit switch is connected in parallel with the bulbs and lamp holders. When in use, first turn off the short-circuit switch to make the whole circuit in a series state and turn off the main switch, select a current-limiting bulb and install it, connect the electrical appliance to be tested through the plug, then plug in the power, and turn on the main switch. If the light bulb is at normal brightness, it means that the electrical equipment under test is short-circuited; on the contrary, if the light is very dark or even does not emit light, it means that the electrical equipment is not short-circuited, and the value of the ammeter can be used for specific judgments. If it is preliminarily judged that the electrical equipment is not short-circuited, then the short-circuit switch on the lamp holder can be closed, because there is a fuse 8 inside the device, so there is no need to worry that the machine will burn out.

Description

A circuit protection device using bulb current limiting

technical field

The utility model relates to a circuit protection device, in particular to a circuit protection device using a bulb to limit the current.

Background technique

Most of the currently known current-limiting sockets have complex structures, the measurement results are not intuitive enough, and the current-limiting value cannot be adjusted, which causes many inconveniences in use.

Utility model content

Aiming at the above problems, the utility model provides a circuit protection device using a light bulb to limit the current. This device can not only effectively prevent the short circuit of the electrical equipment connected to it, but also can easily distinguish whether the electrical equipment is short circuited, and can change current limit value.

In order to solve the above problems, the utility model adopts the following technical solution: a circuit protection device using a light bulb to limit current, which is characterized in that it includes a power connector, a socket panel, an ammeter, a light bulb, a lamp holder, a short circuit switch, a main switch, and a fuse ; The socket panel, the ammeter, the main switch, the fuse, the power connector, the light bulb and the lamp holder are connected in series, and the short-circuit switch is connected in parallel with the light bulb and the lamp holder.

Described socket panel is 86 socket panels.

The power connector is a national standard 220V three-wire plug.

When in use, first turn off the short-circuit switch to make the whole circuit in a series state and turn off the main switch, select a current-limiting bulb and install it, connect the electrical appliance to be tested through the plug, then plug in the power, and turn on the main switch. If the light bulb is at normal brightness, it means that the electrical device under test is short-circuited; on the contrary, if the light is very dim or even does not emit light, it means that the electrical device is not short-circuited, and the value of the ammeter can be used for specific judgments. If it is preliminarily judged that the electrical equipment is not short-circuited, the short-circuit switch on the lamp holder can be closed, because there is a fuse inside the device, so there is no need to worry about the machine burning out.

The utility model can change the current-limiting value by replacing different current-limiting bulbs, and visually judge whether the electric appliance is short-circuited through the on-off and brightness of the bulbs, and has a simple structure.

Description of drawings

Fig. 1 is the circuit schematic diagram of the utility model device.

Fig. 2 is a structural schematic diagram of the device of the present invention.

In the figure 1. power plug, 2.86 type socket panel (for inserting the electrical appliance to be tested), 3. ammeter, 4. light bulb, 5. bulb holder, 6. short circuit switch, 7. main switch, 8. fuse.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail.

As shown in Figure 1, the utility model provides a circuit protection device using a bulb to limit current, including a national standard 220V power connector 1, an 86 socket panel 2, an ammeter 3, a bulb 4, a lamp holder 5, a short circuit switch 6, and a main switch 7. Fuse 8; 86 socket panel 2, ammeter 3, main switch 7, fuse 8, national standard 220V power connector 1, bulb 4, lamp holder 5 in series, short-circuit switch 6 and bulb 4, lamp holder 5 in parallel.

As shown in Figure 2, the 86 socket panel 2, the ammeter 3, and the short circuit switch 6 are embedded on the upper surface of the rectangular insulating shell 9, the main switch 7 is embedded on the front surface of the insulating shell 9, the fuse holder and the power socket are located on the left surface of the insulating shell 9, and the lamp Seat 5 and bulb 4 are installed on the right surface of insulating shell 9, and the internal circuit connection is consistent with that shown in Figure 1.

The above descriptions are only preferred embodiments of the present utility model, and are not limited to the present utility model. For those skilled in the art, the present utility model can have various modifications and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included within the scope of the claims of the present utility model.

Claims (3)

1. a kind of circuit protection device using light bulb current limliting, which is characterized in that including power connection (1), socket panel (2), Ammeter (3), light bulb (4), lamp holder (5), short switch (6), master switch (7), fuse (8)；Socket panel (2), ammeter (3), master switch (7), fuse (8), power connection (1), light bulb (4), lamp holder (5) series connection, short switch (6) and light bulb (4), Lamp holder (5) is in parallel.

2. a kind of circuit protection device using light bulb current limliting according to claim 1, which is characterized in that the socket Panel (2) is 86 socket panels.

3. a kind of circuit protection device using light bulb current limliting according to claim 1, which is characterized in that the power supply Connector (1) is the three pin plug of national standard 220V.